the Activated Partial Thromboplastin Time (aPTT) test, also known as Partial Thromboplastin Time (PTT), is a blood test that measures how long it takes for blood to clot, assessing the function of certain blood clotting factors in the intrinsic and common pathways of the coagulation cascade.
Here’s a more detailed explanation:
What it measures:
The aPTT/PTT test measures the time (in seconds) it takes for a clot to form in a blood sample after specific reagents are added.
Why it’s used:
It helps evaluate a person’s ability to form blood clots appropriately and can be used to:
Monitor the effectiveness of heparin, a blood-thinning medication.
Detect bleeding or clotting disorders.
Identify deficiencies in certain blood clotting factors.
How it’s performed:
A blood sample is drawn, and the time it takes for the blood to clot is measured in seconds.
What the results mean:
A prolonged aPTT/PTT result (longer clotting time) may indicate a deficiency in one or more clotting factors, or the presence of a bleeding disorder, or the effect of heparin.
A shorter-than-normal aPTT/PTT result (faster clotting time) can also occur and may indicate a higher risk of blood clots.
Other names:
Activated partial thromboplastin time (aPTT), partial thromboplastin time (PTT), Kaolin-cephalin clotting time (KCCT).
Related tests:
Prothrombin time (PT) test, which measures a different part of the clotting system
₹550.00Original price was: ₹550.00.₹400.00Current price is: ₹400.00.
A prothrombin time (PT) test measures how long it takes for blood to clot. It’s a blood test that helps evaluate the ability of blood to clot normally.
What it measures
The time it takes for a blood sample to clot after adding chemicals
The function of clotting factors, which are proteins that help blood clot
Why it’s done
To diagnose bleeding or blood clotting disorders
To check if blood-thinning medications are working properly
How it’s done
A blood sample is drawn from a vein, usually in the arm or hand
Chemicals are added to the blood to see how long it takes for a clot to form
Results
Normal PT values are 10 to 14 seconds
The international normalized ratio (INR) is a calculation based on the PT result
Risks
Excessive bleeding
Hematoma (blood under the skin)
Infection at the puncture site
Feeling faint or soreness or pain at the site where blood was drawn
Related tests
Partial thromboplastin time (PTT) is another blood test that measures the function of a different part of the clotting system
₹550.00Original price was: ₹550.00.₹400.00Current price is: ₹400.00.
